MIPS: [turbofan] Make Int32Div and Uint32Div safe.

src/compiler/mips/instruction-selector-mips.cc

Index: src/compiler/mips/instruction-selector-mips.cc
diff --git a/src/compiler/mips/instruction-selector-mips.cc b/src/compiler/mips/instruction-selector-mips.cc
index 8d1631dfa2825e94db192f85d3418c3fcc2641cb..a15afadda2e42c725a008e4a9ed222ed980d2130 100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -442,7 +442,7 @@ void InstructionSelector::VisitUint32MulHigh(Node* node) {
 void InstructionSelector::VisitInt32Div(Node* node) {
   MipsOperandGenerator g(this);
   Int32BinopMatcher m(node);
-  Emit(kMipsDiv, g.DefineAsRegister(node), g.UseRegister(m.left().node()),
+  Emit(kMipsDiv, g.DefineSameAsFirst(node), g.UseRegister(m.left().node()),
        g.UseRegister(m.right().node()));
 }
 
@@ -450,7 +450,7 @@ void InstructionSelector::VisitInt32Div(Node* node) {
 void InstructionSelector::VisitUint32Div(Node* node) {
   MipsOperandGenerator g(this);
   Int32BinopMatcher m(node);
-  Emit(kMipsDivU, g.DefineAsRegister(node), g.UseRegister(m.left().node()),
+  Emit(kMipsDivU, g.DefineSameAsFirst(node), g.UseRegister(m.left().node()),
        g.UseRegister(m.right().node()));
 }
 
@@ -1219,7 +1219,9 @@ InstructionSelector::SupportedMachineOperatorFlags() {
              MachineOperatorBuilder::kFloat64RoundTruncate |
              MachineOperatorBuilder::kFloat64RoundTiesEven;
   }
-  return flags | MachineOperatorBuilder::kWord32ShiftIsSafe |
+  return flags | MachineOperatorBuilder::kInt32DivIsSafe |
+         MachineOperatorBuilder::kUint32DivIsSafe |
+         MachineOperatorBuilder::kWord32ShiftIsSafe |
          MachineOperatorBuilder::kFloat64Min |
          MachineOperatorBuilder::kFloat64Max |
          MachineOperatorBuilder::kFloat32Min |